Python, Call a class function within another class

Question

Can you anyone please help me call the broadcast function from class BroadcastServerFactory in class test, as per attached code

I have tried so many methods of call a function from another class, but no solution

import sys

from twisted.internet import reactor
from twisted.python import log
from twisted.web.server import Site
from twisted.web.static import File

from autobahn.websocket import WebSocketServerFactory, \
                               WebSocketServerProtocol, \
                               listenWS


class test():
    //call broadcast function from here


class BroadcastServerProtocol(WebSocketServerProtocol):

   def onOpen(self):
      self.factory.register(self)

   def onMessage(self, msg, binary):
      if not binary:
         self.factory.broadcast("'%s' from %s" % (msg, self.peerstr))

   def connectionLost(self, reason):
      WebSocketServerProtocol.connectionLost(self, reason)
      self.factory.unregister(self)


class BroadcastServerFactory(WebSocketServerFactory):
   """
   Simple broadcast server broadcasting any message it receives to all
   currently connected clients.
   """

   def __init__(self, url, debug = False, debugCodePaths = False):
      WebSocketServerFactory.__init__(self, url, debug = debug, debugCodePaths = debugCodePaths)
      self.clients = []
      self.tickcount = 0
      self.tick()

   def tick(self):
      self.tickcount += 1
      self.broadcast("'tick %d' from server" % self.tickcount)
      reactor.callLater(1, self.tick)

   def register(self, client):
      if not client in self.clients:
         print "registered client " + client.peerstr
         self.clients.append(client)

   def unregister(self, client):
      if client in self.clients:
         print "unregistered client " + client.peerstr
         self.clients.remove(client)

   def broadcast(self, msg):
      print "broadcasting message '%s' .." % msg
      for c in self.clients:
         c.sendMessage(msg)
         print "message sent to " + c.peerstr


if __name__ == '__main__':

   if len(sys.argv) > 1 and sys.argv[1] == 'debug':
      log.startLogging(sys.stdout)
      debug = True
   else:
      debug = False

   ServerFactory = BroadcastServerFactory
   #ServerFactory = BroadcastPreparedServerFactory

   factory = ServerFactory("ws://localhost:9000",
                           debug = debug,
                           debugCodePaths = debug)

   factory.protocol = BroadcastServerProtocol
   factory.setProtocolOptions(allowHixie76 = True)
   listenWS(factory)

   webdir = File(".")
   web = Site(webdir)
   reactor.listenTCP(8080, web)

   reactor.run()

Aesthete · Accepted Answer · 2013-02-14 12:10:35Z

2

class test():
  def __init__(self, factory):
    factory.broadcast("I don't know what I'm doing!")

Meanwhile, in main...

factory = ServerFactory("ws://localhost:9000",
  debug = debug,
  debugCodePaths = debug)

test(factory)

This will do what you want, but it seems you're missing some core concepts about classes and instances. For the test class to call anything on another class, there needs to be an instance of it first (bar the case of static methods).

edited Feb 14, 2013 at 12:10

answered Feb 14, 2013 at 12:02

Aesthete

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4 Comments

sloth Over a year ago

def __init__(factory): should be def __init__(self, factory):

Ossama Over a year ago

thanks do you mean BroadcastServerFactory(factory) instead of test(factory)

Aesthete Over a year ago

No, that would instantiate a new BroadcastServerFactory with the existing one as the URL argument, and you'd get an exception most likely. You want to call broadcast from test right? That's what this does. I think you need to think about what you're actually trying to achieve, and put it in your question.

Ossama Over a year ago

all i want t do is to broadcast messages from another class.

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